Burner

Abstract

The purpose of the present invention is to provide a proportionally controlled burner that omits as many mechanical components as possible, reducing power consumption, and minimizes the amount of heat lost via a flue. To that end, in the present invention, a high-speed solenoid valve ( 11 ) is provided in a fuel-supply system (Lf); said high-speed solenoid valve ( 11 ) has the ability to open when an inputted pulse signal is on and close when said pulse signal is off; an oxygen-concentration sensor ( 80 ) that is located on the combustion-exhaust side and measures the oxygen concentration of a flue gas is provided, as is a control device ( 60 ) to which measurement results from said oxygen-concentration sensor ( 80 ) are sent; and said control device ( 60 ) has the ability to change the frequency of an inverter ( 50 ) and regulate the amount of combustion air such that the flue-gas oxygen concentration detected by the oxygen-concentration sensor ( 80 ) approaches zero.

1 . A burner comprising a fuel supply system and an air supply system,
 wherein the fuel supply system includes a fuel supply pump disposed thereto, a high-speed solenoid valve is provided in a region on an injection side of the fuel supply pump in the fuel supply system, the high-speed solenoid valve has a function to open when a pulse signal input thereto is ON and a function to close when the signal is OFF, and an inverter is disposed to a power supply circuit of a drive motor which drives the fuel supply pump, and   the air supply system has a blast fan for air supply, and the inverter is disposed to the power supply circuit of the drive motor which drives the blast fan for air supply.   
     
     
         2 . The burner according to  claim 1 ,
 wherein a nozzle is arranged on a discharge side of the high-speed solenoid valve provided in the fuel supply system.   
     
     
         3 . The burner according to  claim 1 ,
 wherein the burner comprises an oxygen concentration sensor which is arranged on the discharge side of the high-speed solenoid valve and measures oxygen concentration of a combustion gas and a control apparatus to which a measurement result of the oxygen concentration sensor, and   said control apparatus has a function for changing a frequency of the inverter in order to adjust a combustion air amount so that the oxygen concentration in the combustion gas being detected by the oxygen concentration sensor becomes approximately zero.   
     
     
         4 . A method for operating a burner according to  claims 3  which burner comprises the oxygen concentration sensor and the control apparatus, the method comprising:
 a step for measuring oxygen concentration in a combustion gas by the oxygen concentration sensor being provided on a combustion exhaust side of an exhaust pipe; and 
 a step for changing a frequency of an inverter and adjusting a combustion air amount so that the oxygen concentration in the combustion gas being detected by the oxygen concentration sensor become approximately zero.